Kernel: bread() should mark blocks as free on read failure

diff --git a/Kernel/devio.c b/Kernel/devio.c
index da77df7..3e4b506 100644 (file)
--- a/Kernel/devio.c
+++ b/Kernel/devio.c
@@ -61,6 +61,7 @@ uint8_t *bread(uint16_t dev, blkno_t blk, bool rewrite)
                if (!rewrite) {
                        if (bdread(bp) == -1) {
                                udata.u_error = EIO;
+                               bp->bf_busy = BF_FREE;
                                return (NULL);
                        }
                }